Add 'Booleans' lesson to csintro. (#433)
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Peli de Halleux
Peli de Halleux
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docs/courses/csintro/booleans/project.md
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docs/courses/csintro/booleans/project.md
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# Project: Boolean
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This is an assignment for students to come up with a micro:bit program that uses Boolean variables, Boolean operators, and possibly the random function.
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## Input
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Remind the students of all the different inputs available to them through the micro:bit.
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## Project Ideas
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### Sunscreen Monitor
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When you shake the micro:bit, it reports the current temperature in degrees Fahrenheit. Button B measures the light level and if it is above 70 degrees AND very bright, it will display a sun icon. If it is above 70 degrees and less bright, it will display a cloudy symbol. If it is dark, it will display a nighttime icon.
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[**micro:bit Sunscreen Monitor**](https://youtu.be/VmD-dcZZQFc)
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https://youtu.be/VmD-dcZZQFc
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#### Sunscreen code
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```blocks
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input.onButtonPressed(Button.B, () => {
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if (128 > input.lightLevel() && 0 < input.lightLevel() && input.temperature() > 22) {
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basic.showAnimation(`
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. # . # .
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# . . . #
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. . . . .
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. . . . .
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. . . . .
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`, 500)
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basic.showAnimation(`
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. # # # .
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# . . . #
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. . . . .
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. . . . .
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. . . . .
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`, 500)
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basic.showAnimation(`
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. # # # .
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# . . . #
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. # . # .
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. . . . .
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. . . . .
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`, 500)
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basic.showAnimation(`
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. # # # .
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# . . . #
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. # # # .
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. . . . .
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. . . . .
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`, 500)
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basic.showAnimation(`
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. . . . .
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. # . # .
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. . . . .
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. # # # .
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# . . . #
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`, 500)
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} else {
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basic.showAnimation(`
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# . . . .
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. . . . .
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. . . . .
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. . . . .
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. . . . .
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`, 500)
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basic.showAnimation(`
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. # . . .
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# # . . .
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. . . . .
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. . . . .
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. . . . .
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`, 500)
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basic.showAnimation(`
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. . # . .
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. . # . .
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# # # . .
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. . . . .
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. . . . .
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`, 500)
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basic.showAnimation(`
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. . # # .
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. . # . .
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# # # . .
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# . . # .
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. . . . .
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`, 500)
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basic.showAnimation(`
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. . # # #
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. . # . .
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# # # . .
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# . . # .
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# . . . #
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`, 500)
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basic.showAnimation(`
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. . . . .
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. # . # .
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. . . . .
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# . . . #
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. # # # .
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`, 500)
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}
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})
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input.onButtonPressed(Button.A, () => {
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if (input.temperature() < 22 && input.temperature() > 6) {
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basic.showAnimation(`
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. . . . .
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. . . . .
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. . # . .
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. . . . .
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. . . . .
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`, 500)
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basic.showAnimation(`
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. . . . .
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. . # . .
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. # # # .
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. . # . .
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. . . . .
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`, 500)
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basic.showAnimation(`
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. . . . .
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. . . . .
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. . . . .
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. . . . .
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. . . . .
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`, 500)
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basic.showAnimation(`
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# # # # #
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# # # # #
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# # # # #
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# # # # #
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# # # # #
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`, 500)
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} else {
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basic.showAnimation(`
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. . . . .
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. . . . .
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. . # . .
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. . . . .
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. . . . .
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`, 500)
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basic.showAnimation(`
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. . . . .
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. . . . .
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. # # # .
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. . . . .
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. . . . .
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`, 500)
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basic.showAnimation(`
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. . . . .
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. . . . .
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. . . . .
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. . . . .
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. . . . .
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`, 500)
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basic.showAnimation(`
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# # # # #
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# . . . #
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# . . . #
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# . . . #
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# # # # #
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`, 500)
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}
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})
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input.onGesture(Gesture.Shake, () => {
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basic.clearScreen()
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basic.showNumber(input.temperature() * 2 + 32)
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})
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```
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Button A displays an animation to tell you whether or not you should use sunscreen (on sunny or cloudy days but not at night or indoors.)
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Make a holder that can hold the micro:bit and a bottle of sunscreen.
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This example uses boolean operations because both light level AND temperature must be high in order to trigger the sun icon:
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```block
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if (128 > input.lightLevel() && 0 < input.lightLevel() && input.temperature() > 22) {}
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```
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### Two-player game
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Create a game in which two players take turns on the same micro:bit. You can use a boolean variable called PlayerATurn to keep track of whose turn it is.
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**Board Game:** Use boolean variables and random values as part of a board game (or improve your Board Game from the Variables lesson). Make the board and pieces and a holder for the micro:bit. Try modding a current board game.
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Board Game with Arrows
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#### Board game arrow code
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```blocks
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let player1Turn = false
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let spin = 0
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let delay = 0
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input.onGesture(Gesture.Shake, () => {
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if (player1Turn == true && Math.random(4) < 3) {
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basic.clearScreen()
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delay = 0
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while (delay < 500) {
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basic.showLeds(`
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. . # . .
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. # # . .
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# # # # .
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. # # . .
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. . # . .
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`)
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delay += 50
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basic.pause(delay)
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basic.showLeds(`
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. . # . .
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. # # # .
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# # # # #
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. . # . .
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. . . . .
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`)
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delay += 50
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basic.pause(delay)
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basic.showLeds(`
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. . # . .
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. . # # .
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. # # # #
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. . # # .
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. . # . .
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`)
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delay += 50
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basic.pause(delay)
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basic.showLeds(`
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. . . . .
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. . # . .
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# # # # #
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. # # # .
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. . # . .
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`)
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basic.pause(delay)
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delay += 50
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player1Turn = false
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}
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} else if (player1Turn) {
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basic.showString("Crash!")
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player1Turn = false
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} else if (Math.random(4) < 3) {
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basic.clearScreen()
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delay = 0
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while (delay < 500) {
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basic.showLeds(`
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. . # . .
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. # # . #
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# # # # #
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. # # . #
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. . # . .
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`)
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delay += 50
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basic.pause(delay)
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basic.showLeds(`
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. . # . .
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. # # # .
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# # # # #
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. . # . .
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. # # # .
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`)
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delay += 50
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basic.pause(delay)
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basic.showLeds(`
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. . # . .
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# . # # .
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# # # # #
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# . # # .
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. . # . .
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`)
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delay += 50
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basic.pause(delay)
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basic.showLeds(`
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. # # # .
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. . # . .
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# # # # #
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. # # # .
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. . # . .
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`)
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basic.pause(delay)
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delay += 50
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player1Turn = true
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}
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} else {
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basic.showString("Crash!")
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player1Turn = true
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}
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})
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basic.forever(() => {
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})
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delay = 0
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spin = 0
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player1Turn = true
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```
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This is an example of a board game in which the micro:bit displays an arrow pointing in a random direction. The paper legend indicates different actions the player must take.
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Here is a portion of the board game's code. A boolean variable is used to determine whose turn it is. If player1Turn is false, then it's player 2's turn. A random number is generated to show the arrow seventy-five percent of the time (for values of 0, 1, or 2).
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```block
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if (player1Turn == true && Math.random(4) < 3) {}
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```
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## Assessment
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**Competency scores**: 4, 3, 2, 1
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### Boolean
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**4 =** More than 2 Boolean variables are implemented in a meaningful way.<br/>
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**3 =** At least 2 Boolean variable is implemented in a meaningful way.<br/>
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**2 =** At least 1 Boolean variable is implemented in a meaningful way.<br/>
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**1 =** No Boolean variables are implemented.
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### Micro:bit program
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**4 =** micro:bit program:<br/>
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`*` Uses Boolean variables in a way that is integral to the program<br/>
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`*` Uses a random function in a way that is integral to the program<br/>
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`*` Compiles and runs as intended<br/>
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`*` Meaningful comments in code<br/>
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**3 =** micro:bit program lacks 1 of the required element.<br/>
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**2 =** micro:bit program lacks 2 of the required elements.<br/>
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**1 =** micro:bit program lacks 3 or more of the required elements.
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### Collaboration reflection
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**4 =** Reflection piece includes:<br/>
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`*` Brainstorming ideas<br/>
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`*` Construction<br/>
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`*` Programming<br/>
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`*` Beta testing<br/>
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**3 =** Reflection piece lacks 1 of the required elements.<br/>
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**2 =** Reflection piece lacks 2 of the required elements.<br/>
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**1 =** Reflection piece lacks 3 of the required elements.
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